of Solutions of Soda and Potash. 



371 



Table II. — Examination of the Densities of Sodium-Hydroxide 

 Solutions by the Graphic Method. 



Apparent errors of the experimental points expressed in 

 terms of the density x 10 6 . Mean experimental error 

 =6-31. 



A. Apparent errors according to a drawing showing breaks at 3 to 4, 121, 200, 



24-05, 29-40, 350, 38 77, and 42-6 per cent. 



B. Apparent errors according to a drawing showing breaks at 1*8, 7"8, 16, 22, 



26-7, 322, 36 9, 40-7, and 46-4 per cent. 



C. Apparent errors according to a drawing showing breaks at 12*1, 24*05, 35, 



and 42 6 per cent. 



D. Apparent errors according to a drawing showing breaks at 3 - 5, 20'0, 29'4, 



and 38'77 per cent. 



p- 



A. 



B. 



C. 



D. 



502 



+20 





+20 



+37-5 



492 



- 7-5 





- 75 



+ 5 



48-2 



- 2-5 





- 2-5 



+ 10 



473 













+ 5 



463 















- 2-5 



45-6 















- 10 



45-2 



+ 2-5 



+ 2-5 



+ 2-5 



-12-5 



44-5 







- 75 







-27-5 



43-7 







- 5 







-25 



429 



+ 2-5 



+ 12-5 



+ 2-5 



- 5 



42-3 







+ 2-5 







-15 



41-8 



+ 2-5 



+ 12-5. 



+ 5 







41-5 



4- 5 



+ 17-5 



+ 10 



+ 7'5 



41-0 



-225 



-12-5 



-15 



-15 



40-6 











+ 5 



4- 5 



40-3 



- 5 



+ 5 



- 2-5 



4- 2-5 



400 



- 5 



+ 7-5 



- 5 



+ 5 



39-5 



+ 17-5 



+275 



+ 5 



+20 



391 



4- 5 



+ 5 



-20 



+10 



38 7 



- 2-5 



-12-5 



-275 



-15 



38-3 



- 5 



- 5 



-20 



-12-5 



38-0 



+ 2-5 



+ 75 



- 5 



- 5 



37-8 



- 5 







+ 10 



-12-5 



375 



-10 



- 75 



- 7-5 



-17-5 



371 



4- 5 



+ 5 



+ 17-5 



+ 5 



36-7 



4-12-5 



+ 5 



+20 



+ 7-5 



36-2 







- 2-5 



4- 5 







35-9 







- 5 



+ 2-5 



- 2-5 



35-3 



- 7-5 



-12-5 



- 1-25 



-10 



34-7 



+25 



+30 



+25 



+32-5 



341 



- 5 







— 7-5 



+ 2-5 



334 



+ 25 



+ 5 



- 75 



+ 2-5 



32-9 



+ 10 



+ 12-5 



- 5 



+ 7-5 



32-3 











- 7 5 



+ 2-5 



31-6 



+ 7-5 



+ 5 



+ 5 



+ 1-75 



310 



-15 



-20 



- 15 



- 5 



303 



+ 7-5 



+ 7-5 



+ 10 



+ 15 



29'7 







+ 2-5 



+ 7-5 



+ 10 



28-9 







- 5 



+ 5 



4- 5 



